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What does it mean if my p-value is 1?
Popular Answers (1) When the data is perfectly described by the resticted model, the probability to get data that is less well described is 1. For instance, if the sample means in two groups are identical, the p-values of a t-test is 1. 12 Recommendations.
What does a p-value of 1 imply about the null model?
The p-value is a number between 0 and 1 and interpreted in the following way: A small p-value (typically ≤ 0.05) indicates strong evidence against the null hypothesis, so you reject the null hypothesis. p-values very close to the cutoff (0.05) are considered to be marginal (could go either way).
Is there a p value of 1 for Mann Whitney U?
I’m using the rstatix library in R 3.6.3 through RStudio 1.2.5042 and am getting the impossible p-value of 1 when running a two-sample Wilcoxon aka Mann-Whitney U Test.
How to perform a Mann Whitney U test in R?
How to Perform a Mann-Whitney U Test in R. A Mann-Whitney U test (sometimes called the Wilcoxon rank-sum test) is used to compare the differences between two independent samples when the sample distributions are not normally distributed and the sample sizes are small (n <30). It is considered to be the nonparametric equivalent to the two-sample
Can a p-value be 1.0 in their thesis?
In your case, the two groups (whatever they are) don’t have the same values so the p-value cannot really be 1: there clearly is some small difference between the groups, and thus some nonzero chance that another sample under a null hypothesis of 0 could get an even smaller difference. Can people report P-value = 1 in their thesis?
What does the result of Wilcoxon Mann Whitney mean?
If you use wilcox.test (x,y,paired=FALSE,alternative=”less”), and the p-value is significant, then it means that x and y come from different populations, and that y comes from a population with larger values than x. Not the answer you’re looking for? Browse other questions tagged r wilcoxon-mann-whitney-test or ask your own question.